Motor-vehicle brake.



- PATENTBDJUNB 26, 1906. 0. SCHMIDT.

MOTORVEHIGLB BRAKE. -APPLIOATION FILED PEB. 4f, 1905. i 122" v 'l 3 SHEETS-SHEET 1. x

v No. 824,151.' i

o. 'scHMInT. l l MOTOR VEHICLE BRAKE'. y "Arruonlon rmlzn 3.4.1905.

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PATENTED JUNE 26, 1906.-

3 SHEETS-SHEET 2.

PATETEDNJUNB 20, 1900. 0. SCHMIDT.

0401705 VEHICLE BRAKE'.

APPLIOzIfION PILD FEB. 4, 1905.

3 SHEETS-SHEET 3` y UNITED, STATES PATENTn QFFICE. CHARLES soHMiDTfioF DETROIT; MICHIGAN, AssieNoR To PACKARD uMOTOR CAR` OOMPANY,1 or DETROIT, MICHIGAN, A CORPORATION OF wns'r vIRcrNiA. ,f

MOTOR-VEHICLE BRAKE.

Specification of Letters Patent.

Application filed February 4, 1905. Serial No.v 244,202.

Np. 824,151. raenteauune 26, 1906.

I v To all whom it may concern: openat the opposite side and receivesbezo case mounted thereon.

3Q' rn'ain fraine'oflthe vehicle, said on the rear axle 12. ablyconstructed iii two sections in the usual Be it known that I, CHARLES SCHMIDT, a citizen of the lrtepublic of France, and a resident of Detroit, Wayne county, State of Michi- 5 gan, lhave invented lcertain new and useful Improvements in Motor-Vehicle Brakes, of which the 'following 1s a specificatlon.

' y The present invention relates to improvements in vbraking mechanism for automo- 1`o biles; and it comprises two sets of braking devices for each ofthe driving-axle sections and Incansgfor operating said vdevices either independently or simultaneously.

The invention will be described in connec- IS tion with the accompanying drawings, in

which- I Figure 1 is a plan view of a portion of 'a motor-vehicle frame, showing the drivingaxle, the brake mechanism, and the gear- Fig.` 2 is a side elevation of the apparatus shown in Fig. 1', one

. of the rear 'wheels being broken awayto disclose the',l brake proper. Fig. 3'is a horizon- I A tal' section through one. of the rear hubs.

Fig. 4 isaside elevation of a brake proper, V vand Fig/.Bis an inside view of the bracket which `supports the brake-shoes and"` their operating earns and levers.

Referring tolthe drawings, 10 indicates the frame being supported on suitable springs 11, qwhich rest The rear axle is prefernianner, said ysections being connected and driven by gearing inclosed in a gear-case 13. The construction of the rear axle and the mechanism for driving it have no bearing upon the present invention, and therefore they will vnot be described in detail.

Each rear wheel 14 has a hub 15, which is fast on a rear-axle section 12. The rotatable rear-axle sections 1 2 are carried in fixed cylindrical rear axle-casings 66, the inner ends of which are rigidly connected to the gearcase and the outer ends of which are provided with integral disk-like brackets `16, to be hereinafter referred to. Rigidly connected with the hubs 15 are cylindrical flanges 17. These ianges rotate with the wheels, and

brake-shoes coperate with both their inner and outersurfaces. Eachinnerbrake-shoe 18 consists in a ring which is pivotally connected with thebracket 16 at one side and which 1s 'contact with the flange 1T.

tween its ends a cain adaptedv to expand the ring. As shown in Figs. 3 and 4, lthe ring 18 his provided with an elongated opening 19,

- permits theshoe tobe raised sufficiently to clear the rotating flange 17. vThe ends 22 of the ring 18 are broad and constitute bearingsurfaces for a double cam23, mounted on a rook-shaft 24. A r'spring 25 holds the ringends in contact with the cani, and the cam is vof such shape that when partially turned it will expan the ring against the liange 17.

By reason'of the elongated opening 19 thering can be expanded so that every portion of it will bear with, uniform pressure against the liange. The stud 20 and the shaft24 prevent vthe brake-shoe Afrom turning, and hence a powerfulresistance to the rotation of the wheel is obtained.

vThe shaft 24v is mounted in the bracket 16 and at its inner end carries an arm 25. This arm 25 is connected with a pedal 26 for op'- erating the inner brake by rneans of link 27, arm 28, hollow shaft 29, arm 30, and link 31. When the pedal 26fis pushed forward, ,the

shaft 24 is rocked and the inside brake'ap plied. When. the pedal is released, the

springs 21 and 25- throw off the brake'. An

additional spring may-be used to ldraw the `pedal forward to its normal osition. -There are arms 28 at opposite en s of the hollow shaft 29 and connections from said arms to two inside brakes, as' shown in.Fig. 1.

Referring again toV Figs. 3 Vand .4, 32 indi cates the outside brake, which consists of two approximately semicircula'r bands t 32lL 325` hinged at one side-to a' stud I33, fixed to the bracket 16. These sections 32a 32h .are pref- -erably provided with linings 34, of felt,

leather, or'other suitable fabric. The free ends of the brake-sections 3 21-32bare connected by toggle-levers 35 36'one7of said levers being screw-threaded and adj stably connected with one ofthe brake-sections,

with the other brake-section- The upper brake-section 32h tends normally to rest upon the rotating liange '17, and to hold the brake normally free from the iange a spring 37 is provided, Fig. 4. A post 3S is connected with the brake-shoe 32 and provided at its upper end with an adjustable head or nut 39. The spring 37 is interposed between the head 39 and an extension 4() ofthe bracket 16. The lower brake-shoe 32a separates from the rotating Iiange 17 by gravity, while the upper brake-shoe 32h is raised by the spring 37 when the toggle-levers are in position to throw off the brake, as illustrated in `Fig. 4. The head 39 should be adjusted so that the separation ofthe shoes 32a 32" from the flan ge shall be substantially equal. The toggle-levers 36 are in the form of elbow-levers, and they are connected to operate the brake with a hand-lever 41 by means of links 42 and arms'43 on shaft 44. One of the arms 43:3 is connected by a link 45 with an arm 46 on a shalt 47. The brake-lever 41 is rigidly connected with said shaft 47. The operation of the brake-lever 41 rocks the shaft 47, and

through the connections mentioned it applies the outer brake 32 to the rotating flange 17 Upon the shaft 47 is an arm 48, which is eonnected by a link 49 with an elbow-lever 50. The elbow-lever 5() carries a roll which is adapted to rook an arm 51 when the brake is applied. The arm 51 is mounted on a clutch-operating shaft 52. On this shaft is an arm 53, which engages a sliding collar 54. This collar is connected with the clutch (not shown) by means of a rack 55 or any other suitable connection. The clutch is normally closed by means of a spring 56 and it can also be thrown out by means of a pedal 57.

ln Figs. 1 and 2 of the drawings is shown a link 58 for operating the speedgears, said link being connected to an arm 5S) on a hollow shait 60, which shaft is rocked by means oi' a hand-lever 63. The shaft 6U surrounds a portion ot the shai t 47.. (`)n the shaft 6() is a second hollow shaft 62, operated by a lever (il. An arm 64 on shaft 62 is connected by' a link o5 'with means l'or shifting the reverse-gear.

lln the ordinary operation ol` the brake mechanism tlu` hand lnake-lever 4l and the outer brake-shoes are employed. these outer brakes are applied the clutch is opened and the motive power cut out. The inner brakes are used on very steep hills or in making emergency stops. The arm. 51V has a notch or recess 51"', Fig. 2, into which the roll on the elbow-lever 50 lits. This interlockingr of the roll and the notch assists in holding the clutch open until the brake is released.

The brackets 16 are preferably integral portions ofthe stationary rear-axle casing 66. The rear-axle casing has integral supports G7 for the springs 11 and integral lugs 68 for the brace-rod 69. The stationary axle-casing (36 able lever or equivalent device may be used to o crate either brake.

l ithout limiting myself to the precise construction and arrangement of parts illustrated and described, I claim- 4ln a motor-vehicle, the combination with the fixed rear-axle casing, the rear-axle sections rotating in said casing and the wheels connected to said sections and provided with inner and outer braking-surfaces, of brackets 16 integral with said rear-axle casing, inner and outer brakes supported by each of said brackets, springs supported by said brackets for raising both the 'inner and outer brakeshoes from the braking-surfaces of the wheel,

studs upon said brackets for carrying said inner and outer brakesshoes, and means for applying said inner and outer brake-shoes independently.

,ln testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES S(lll\fl.ll)'l`.

Witnesses RUssnLL HUFF, ll. 1G. 1)A1Nn,.lr.

IDO 

